Gas burner secondary air feed and flame baffle



July 27, 1954 D DU FAULT 2,684,711

GAS BURNER SECONDARY AIR FEED AND FLAME BAFFLE Filed April 23, 1952 INVENTOR.

Patented July 27, 1954 GAS BURNER SECONDARY AIR FEED AND FLAME BAFFLE Homer D. Du Fault, Easthampton, Mass.

Application April 23, 1952, Serial No. 283,827

1 Claim.

This invention relates to improvements in gas burner apparatus.

The principal objects of the invention are directed to the provision of gas burner apparatus which is adapted for conversion purposes where the apparatus is installed in a boiler or hot air furnace or the like.

The novel features of the invention provide apparatus which is readily and easily installed and the components thereof are readily and easily replaced without the necessity of general dismantling.

According to special features of the invention, secondary air is directed in parallelism with the gas discharged from the gas port to bring about proper mixing and efiicient combustion. The air and gas flow in separate streams to a point above the air port where they intermix.

All of the above objects I accomplish by means of such structure and relative arrangements of parts thereof, as will fully appear by a perusal of the description below and by various specific features which will be hereinafter set forth.

To the above cited and other ends and with the foregoing and various other novel features and advantages and other objects of my invention as will become more readily apparent as the description proceeds, my invention consists in certain novel features of construction and in the combination and arrangement of parts as will be hereinafter more particularly pointed out in the claim hereunto annexed and more fully described and referred to in connection with the accompanying drawings wherein:

Fig. 1 is a vertical sectional elevational view through the lower part of a heater having the apparatus of the invention associated therewith;

Figs. 2 and 3 are plan views of the primary and secondary rings of the apparatus shown in Fig. 1; and

Fig. 4 is a plan view of the spacer of the apparatus of Fig. 1.

Referring now to the drawings more in detail, the invention will be fully described.

The lower portions of the wall of a furnace are represented by 2 and a housing is represented by 4 from which extends a gas supply stand pipe 6 connected to the lower end of a stand pipe 8.

Gas is supplied the housing Which will enclose the usual controls and means for supplying primary air when necessary. It will be understood that the products of combustion are ignited by a pilot and that the burner is operated through the control mechanism. For purposes of diswardly therefrom as shown in Fig. 1.

2 closure, it will be assumed that a mixture of gas and air will flow upwardly in the stand pipe according to operation of the control apparatus.

Means for adjustably supporting the stand pipe 8 may include such as bolts In in threaded engagement with ears l2 on opposite sides of the said stand pipe. The supporting mean will be such that together with the pipe I 6 the stand pipe will be maintained in vertical substantially rigid position.

The upper end of the stand pipe is, of course, open for the flow of fuel therefrom and it is provided with lower and upper vertically spaced external annular shoulders l4 and It.

An air port member l8 has an inner annular ring '20 for receiving upper end portion 22 of the stand pipe 8 and rests on shoulder I4 and outer annular ring 24 connected to the inner portion 20 by radially extending webs 26 and 28.

An annular flange 30 extends outwardly horizontally from ring 24 and supports horizontal wall members 32 and 34 of the furnace which at outer edges is supported by angles 36 carried by the furnace wall 2.

The webs 28 and the outer ring and flange of member l8 are arranged to provide a space 38 for pilot mechanism, and the space between the rings 20 and 24 provide an air port 25, see Fig. 2.

A gas port member 40 has a central ring 42 and an outer ring 44 connected thereto in concentric relation by radial webs 4B and 48. An uppermost portion 50 of the stand pipe is receivable in the ring 42 which ring rests on shoulder [6 of the stand pipe and provides a gas port 52 as a continuation of the stand pipe outlet. Rings 42 and 44 being spaced as they are provide an air port 54.

The ribs 48 and the outer ring of member 40 are arranged to provide a space 56 for pilot mechanism similarly to the space 38 of member 3.

An inner hub 58 of air port member is spaced inwardly of and connected to the inner ring 42 of member 40 by webs 60 and is provided with a central socket 62.

A mast 64 has a lower end receivable in socket 62 and rests on the hub 58 so as to extend up- A horizontally disposed flange 66 on the upper end of the mast supports a baflle 68 which is preferably formed from ceramic material. Sockets 10 provided in the bafile loosely receive dowels 12 extending upwardly from the flange 66 to hold the bafile against displacement.

The parts are constructed and arranged to facilitate ready and easy assembly thereof while they are immovably fixed against relative movement.

The air port member supported by the upper end of the stand pipe provides an air port for upward flow of air around the stand pipe. The gas port member also supported by the stand pipe functions as a continuation of the air port of the member therebelow and at the same time has a central ring extending above its outer ring which functions as a continuation of the outlet of the stand pipe.

By means of the novel construction of the gas and air port members, gas is conducted upwardly from the stand pipe and is discharged at a distance above the outlet of the air port. In this way, secondary air from the air port is mixed with the gas at a distance above the air port and below the bafiie. In other words, gas and secondary air flow upwardly in separate streams and are in contact above the outlet of the gas port only and results in efiicient combustion.

The invention may be embodied in other specific forms without departing from the essential characteristics thereof. Hence. the present embodiments are therefore to be considered in all respects merely as being illustrative and not as being restrictive, the scope of the invention being indicated by the appended claim rather than by the foregoing description, and all modifications and variations as fall within the meaning and purview and range of equivalency of the appended claim are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the United States is:

The combination with a horizontal furnace wall having an opening therethrough and the upper open end of a stand pipe in the opening provided with upper and lower annular shoulder of gas burner apparatus comprising in combination, separate air port and gas port members and a mast and a baffle, said air port member including inner and outer rigidly connected radially spaced annular ring members providing an air port therebetween with said inner ring member surrounding the stand pipe and being supported by the lower shoulder thereof and said outer ring member engaging the furnace wall around the opening therein, said gas port member including inner and outer rigidly connected radially spaced annular ring members providing an inner gas port and an air port therearound with said inner ring member surrounding the stand pipe and being supported by the upper shoulder thereof and disposed above said air port member, said gas port member being provided with an apertured hub disposed radially inwardly within the inner ring thereof and being rigidly connected thereto, said mast having a lower end removably received in the aperture of said hub, supported vertically therefrom and provided on its upper end with a horizontally disposed flange provided with upwardly extending dowels, and said baiiie including a disc of ceramic material disposed on the flange of said mast provided with openings in which said dowels are disposed.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,475,240 Hassmer et a1. July 5, 1949 2,549,347 VanTuyl Apr. 1'7, 1951 2,638,975 Berry May 19, 1953 2,642,131 Du Fault June 15, 1953 

